import { login, logout, getInfo } from '@/api/user'
import { getToken, setToken, removeToken } from '@/utils/auth'
import { resetRouter, constantRoutes, asyncRoutes, anyRoutes } from '@/router'
import router from '@/router'

const getDefaultState = () => {
  return {
    token: getToken(),
    name: '',
    avatar: '',
    routes:[],
    buttons:[],
    roles:[],
    //对比之后【项目中已有的异步路由，与服务器返回的标记信息进行对比最终需要展示的理由】
    resultAsyncRoutes:[],
    //用户最终需要展示全部路由
    resultAllRputes:[]
  }
}

const state = getDefaultState()

const mutations = {
  RESET_STATE: (state) => {
    Object.assign(state, getDefaultState())
  },
  SET_TOKEN: (state, token) => {
    state.token = token
  },
  // SET_NAME: (state, name) => {
  //   state.name = name
  // },
  // SET_AVATAR: (state, avatar) => {
  //   state.avatar = avatar
  // }
  SET_USERINFO: (state, userInfo) => {
    state.name = userInfo.name;
    state.avatar = userInfo.avatar;
    state.buttons = userInfo.buttons;
    state.routes = userInfo.routes;
    state.roles = userInfo.roles;
  },
  //最终计算出的异步路由
  SET_RESULTASYNCROUTES:(state,asyncRoutes)=>{
    //vuex保存当前用户的异步路由，注意，一个用户需要展示完成路由：常量、异步、任意路由
    state.resultAsyncRoutes = asyncRoutes;
    //计算出当前用户需要展示所有路由
    state.resultAllRputes = constantRoutes.concat(state.resultAsyncRoutes,anyRoutes);
    // //给路由器添加新的路由
    router.addRoutes(state.resultAllRputes)
 }
}

const actions = {
  //这里在处理登录业务
  async login(context, userInfo) {
    // 解构出用户名与密码
    const { username, password } = userInfo;
    let result = await login({ username: username.trim(), password: password });
    //注意：当前登录请求现在使用mock数据，mock数据code是20000
    if(result.code==20000){
      //vuex存储token
      context.commit('SET_TOKEN',result.data.token);
      //本地持久化存储token
      setToken(result.data.token);
      return 'ok';
    }else{
      return Promise.reject(new Error('failed'));
    }
  },

  // get user info
  getInfo({ commit, state }) {
    return new Promise((resolve, reject) => {
      getInfo(state.token).then(response => {
        const { data } = response
        // console.log(data);
        // if (!data) {
        //   return reject('Verification failed, please Login again.')
        // }

        // const { name, avatar } = data
        // commit('SET_NAME', name)
        // commit('SET_AVATAR', avatar)

        //vuex存储用户全部的信息
        commit('SET_USERINFO', data);
        // commit('SET_RESULTASYNCROUTES',computedAsyncRoutes(cloneDeep(asyncRoutes),data.routes));
        commit('SET_RESULTASYNCROUTES',computedAsyncRoutes(asyncRoutes,data.routes));
        resolve(data)
      }).catch(error => {
        reject(error)
      })
    })
  },

  // user logout
  logout({ commit, state }) {
    return new Promise((resolve, reject) => {
      logout(state.token).then(() => {
        removeToken() // must remove  token  first
        resetRouter()
        commit('RESET_STATE')
        resolve()
      }).catch(error => {
        reject(error)
      })
    })
  },

  // remove token
  resetToken({ commit }) {
    return new Promise(resolve => {
      removeToken() // must remove  token  first
      commit('RESET_STATE')
      resolve()
    })
  }
}

//定义一个函数：两个数组进行对比，对比出当前用户到底显示哪些异步路由
const computedAsyncRoutes = (asyncRoutes,routes)=>{
//   //过滤出当前用户【超级管理|普通员工】需要展示的异步路由
 return asyncRoutes.filter(item=>{
      //数组当中没有这个元素返回索引值-1，如果有这个元素返回的索引值一定不是-1 
     if(routes.indexOf(item.name)!=-1){
       //递归:别忘记还有2、3、4、5、6级路由
       if(item.children&&item.children.length){
           item.children = computedAsyncRoutes(item.children,routes);
       }
       return true;
     }
  })
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}

